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Finding the Fourth Proportional to 479.49, 718.96 and 154.86

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Solution

The fourth proportional to 479.49, 718.96 and 154.86 is: 232.20

Step by Step Solution

  1. Step 1: Write the proportion equation
    479.49 : 718.96 = 154.86 : x
  2. Step 2: Convert to fraction form
    479.49/718.96 = 154.86/x
  3. Step 3: Cross multiply
    479.49x = 718.96 × 154.86
  4. Step 4: Simplify right side
    479.49x = 111,338.15
  5. Step 5: Solve for x
    x = 111,338.15/479.49
  6. Step 6: Final answer
    x = 232.20

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Why These Related Problems?

These problems maintain the same ratio (1.50) or explore similar proportional relationships. Practicing with related ratios helps build understanding of proportional relationships.